Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

1st Constitution Bancorp

Cranbury, New Jersey

We hereby consent to the incorporation by reference in the Registration Statements on Forms S-8 (No. 333-188843, No. 333-184412, No. 333-143188, No. 333-132474, and No. 333-204552) of 1^st Constitution Bancorp of our reports dated March 16, 2017, relating to the consolidated financial statements and effectiveness of 1^st Constitution Bancorp’s internal control over financial reporting, which are incorporated by reference in this Annual Report on Form 10-K.

/s/ BDO USA, LLP

Philadelphia, Pennsylvania

March 16, 2016